com.graphaware.runtime.walk

Class ContinuousNodeSelector

java.lang.Object

com.graphaware.runtime.walk.ContinuousNodeSelector

All Implemented Interfaces:

NodeSelector

public class ContinuousNodeSelector
extends Object
implements NodeSelector

NodeSelector that selects a Node by finding the first node matching the provided NodeInclusionPolicy with ID higher than the last one. In the beginning or when all IDs are exhausted, the selector starts from 0.

Constructor Summary

Constructors

Constructor and Description
ContinuousNodeSelector() Constructs a new ContinuousNodeSelector that selects any node which isn't a framework-internal node.
ContinuousNodeSelector(long lastNodeId) Constructs a new ContinuousNodeSelector that selects a node that matches the given NodeInclusionPolicy.
ContinuousNodeSelector(NodeInclusionPolicy inclusionPolicy) Constructs a new ContinuousNodeSelector that selects a node that matches the given NodeInclusionPolicy.
ContinuousNodeSelector(NodeInclusionPolicy inclusionPolicy, long lastNodeId) Constructs a new ContinuousNodeSelector that selects a node that matches the given NodeInclusionPolicy.

Method Summary

Modifier and Type	Method and Description
org.neo4j.graphdb.Node	selectNode(org.neo4j.graphdb.GraphDatabaseService database) Select a node from the graph.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ContinuousNodeSelector

public ContinuousNodeSelector()

Constructs a new ContinuousNodeSelector that selects any node which isn't a framework-internal node.

ContinuousNodeSelector

public ContinuousNodeSelector(long lastNodeId)

Constructs a new ContinuousNodeSelector that selects a node that matches the given NodeInclusionPolicy.

Parameters:

lastNodeId - ID of the last node selected by this selector.

ContinuousNodeSelector

public ContinuousNodeSelector(NodeInclusionPolicy inclusionPolicy)

Constructs a new ContinuousNodeSelector that selects a node that matches the given NodeInclusionPolicy.

Parameters:

inclusionPolicy - The NodeInclusionPolicy to consider when selecting nodes.

ContinuousNodeSelector

public ContinuousNodeSelector(NodeInclusionPolicy inclusionPolicy,
                              long lastNodeId)

Constructs a new ContinuousNodeSelector that selects a node that matches the given NodeInclusionPolicy.

Parameters:

inclusionPolicy - The NodeInclusionPolicy to consider when selecting nodes.

lastNodeId - ID of the last node selected by this selector.

Method Detail

selectNode

public org.neo4j.graphdb.Node selectNode(org.neo4j.graphdb.GraphDatabaseService database)

Select a node from the graph.

Specified by:

selectNode in interface NodeSelector

Parameters:

database - in which to select a node.

Returns:

A Node in the given database, null if a node can't be selected for whatever reason, perhaps because there is no (matching) node in the database.